Details from contemporary sources:
1855 Application to complete Section 1 of the Trigonometrical Survey of Sydney - June [ref: 26/17/618]
1855 Bond £200 - sureties: George Rattray and Alfred Mitchell - July [ref: 65/0021]
1855 Report on his progress - October [ref: 26/19/0985]
1855 City Surveyor, Baron, complains of his slowness in filling in Section 1 - November [ref: 26/20/1080]
1855 Letter of authority from WH Johnson claiming any payments due to Brownrigg - December [ref: 26/20/1182]
1856 Requests that his contract not be cancelled - January [ref: 26/21/0050]
1856 City Surveyor, Baron, complains of his continued slow progress - suggests contract be forfeited - August [ref: 26/024/693]
1856 Requests reasons for cancellation of contract - October [ref: 26/025/886]
1856 Requests payment due - December [ref: 26/026/1098]
1857 Requests a statement of how the amount £49/19/0 certified by the City Engineer was calculated - February [ref: 26/027/159]GenderMaleSource system IDTPER-000510
